My question is- what exactly is a PINS notice for harassment and how long will it last?

We've had one issued against a boy we were having some trouble with, and just trying to Google how long it would last people are saying it's a very different thing to what the officer who issued it told us it was (hope that made sense I feel like I'm rambling)

Thank you!
I got told the other day to go away and eat faeces (not worded so politely!) and that I always need to be perfect because I told someone their number plate was illegal lol. Apparently police pulled them and told them it was okay
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